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(7) Precautions on the use of HSS drill bits
For example, although the Model DS 18DSFL is designed for drilling capacities of 38 mm (1-1/2") in
wood, and 13 mm (1/2") in mild steel, this capability is not as efficient as conventional electric power
tools. In particular, when drilling through material with a 13 mm (1/2") drill bit, the drill tends to become
locked when the drill bit penetrates a material. For this reason, the customer should be cautioned to
reduce the thrust on the main body of the drill when drilling completely through a material to avoid
locking the tool. Repeated locking of the drill causes excessive current to flow from the battery, thereby
not only reducing the amount of work possible per charge, but also running the risk of motor burnout.
(8) Securely tighten the sleeve of the keyless chuck.
The keyless chuck may slip during operation when using a cylindrically shaped drill bit shank,
depending on the surface conditions, materials, and other factors. Please instruct customers to
retighten the keyless chuck more securely if the keyless chuck slips during operation. The holding force
of the keyless chuck increases as you increase the tightening force of the keyless chuck.
(9) Avoid continuous use.
Although the Models DS 14DSFL and DS 18DSFL can withstand continuous operation under certain
conditions, operating conditions differ depending on the workpiece material and sharpness of the drill bit
in use. Please instruct customers to avoid continuous use of the Models DS 14DSFL and DS 18DSFL,
and generally take about a 15 minute break following a single charge operation.
(10) Keep the battery out of dust.
Protect the battery from being covered with dust during operation. Protect the battery from being
covered with dust accumulated on the Models DS 14DSFL and DS 18DSFL during operation. Do not
leave the battery in a dusty area when not in use. Remove dust from the battery and store it separately
from such metallic parts as screws and nails.
B. Suggestions and precautions on efficient use of the charger and storage battery
If the Types BSL 1415 and BSL 1815 storage batteries are exposed to direct sunlight for an extended
period or if the tool has just been operated for a long time, charging may not be possible at battery
temperature above 50°C (122°F). In such case, the customer should be advised to place the battery in a
shaded area with a good airflow, and allow it to sufficiently cool down before recharging. This phenomenon
is common to all existing batteries and chargers that employ temperature-sensitive overcharge protection
devices. The cooling time required before recharging can be accomplished varies from a few minutes to
about 40 minutes, depending on the load, duration of use, and ambient temperature.
